Pearlescent pigments based on fine and thin substrates

US11230643B2 · kind B2 · utility

Assignee

• ECKART GmbH · DE

Inventors

• Michael Gruener · Zwingenberg, DE
• Ulrich Schmidt · Flörsheim, DE
• Günter Kaupp · Jessenitz Siedlung, DE
• Peter Krueger · Achern, DE
• Jens Depner · Taufkirchen, DE
• Katrin Steinbach · Koblenzer Straße, DE
• Ralph Schneider · Achern, DE
• Frank Henglein · Nuremberg, DE

Key dates

• Filing date: Apr 15, 2009
• Grant date: Jan 25, 2022
• Expiry date: Aug 11, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2200/405
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Pearlescent pigments including a largely transparent platelet-shaped substrate having a density ρS and at least one optically active coating having a density ρM, the substrate having an average size d50 of 3 to 8 μm and an average height hS of 40 to 110 nm. The disclosure further relates to a method for producing the pearlescent pigments, and also to the use thereof.